JPS56128042A - Fault supervisory system of light repeating transmission line - Google Patents

Fault supervisory system of light repeating transmission line

Info

Publication number
JPS56128042A
JPS56128042A JP3094180A JP3094180A JPS56128042A JP S56128042 A JPS56128042 A JP S56128042A JP 3094180 A JP3094180 A JP 3094180A JP 3094180 A JP3094180 A JP 3094180A JP S56128042 A JPS56128042 A JP S56128042A
Authority
JP
Japan
Prior art keywords
light
signal
transmission line
supervisory signal
supervisory
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3094180A
Other languages
Japanese (ja)
Other versions
JPS6156905B2 (en
Inventor
Mitsuo Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3094180A priority Critical patent/JPS56128042A/en
Publication of JPS56128042A publication Critical patent/JPS56128042A/en
Publication of JPS6156905B2 publication Critical patent/JPS6156905B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To use a supervisory device in common and also simplify a supervisory signal, by using a nondense wave of a pulse signal as a fault supervisory signal between light terminal equipments, and also placing a detection circuit, a counting circuit and a light switching circuit. CONSTITUTION:A supervisory signal for a nondense wave of a pulse signal is generated by the signal generator 33, and it is sent out to the main transmission line 18 from the light terminal equipment 11. And, this supervisory signal is detected by the detection circuit 36 which is provided on each light repeater 15, its output pulse is counted by the counting circuit 37, and when it has reached a prescribed value which has been decided at every light repeater 15, the light switching circuit 38 is closed. Subsequently, when the light switching circuit 38 is closed, the supervisory signal is returned to the main transmission line 19, and it is compared with a supervisory signal which has been sent out by the detector 34 of the light terminal equipment 11.
JP3094180A 1980-03-13 1980-03-13 Fault supervisory system of light repeating transmission line Granted JPS56128042A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3094180A JPS56128042A (en) 1980-03-13 1980-03-13 Fault supervisory system of light repeating transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3094180A JPS56128042A (en) 1980-03-13 1980-03-13 Fault supervisory system of light repeating transmission line

Publications (2)

Publication Number Publication Date
JPS56128042A true JPS56128042A (en) 1981-10-07
JPS6156905B2 JPS6156905B2 (en) 1986-12-04

Family

ID=12317697

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3094180A Granted JPS56128042A (en) 1980-03-13 1980-03-13 Fault supervisory system of light repeating transmission line

Country Status (1)

Country Link
JP (1) JPS56128042A (en)

Also Published As

Publication number Publication date
JPS6156905B2 (en) 1986-12-04

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